{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD1117ADT-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD1117ADT-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/LD1117ADT-TR","factsUrl":"https://icboms.com/api/mcp/products/LD1117ADT-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD1117ADT-TR, adjustable positive LDO regulator, 1A output, 80dB PSRR at 120Hz, 1.3V dropout max at 1A, DPAK (TO-252-3) surface-mount package.","salesMarkdown":"## Adjustable LDO for post-switcher rails The LD1117ADT-TR is a 1A adjustable positive LDO regulator from STMicroelectronics, in a DPAK (TO-252-3) surface-mount package. ## Dropout headroom and output range Maximum dropout is 1.3V at the full 1A load — so a 5V rail needs at least 6.3V input to stay in regulation at peak current. The adjustable output spans 1.25V up to 15V, set by a resistive divider on the ADJ pin. ## Active production, DPAK footprint ## Protection and quiescent current Built-in over-current and over-temperature protection cover the common fault cases — shorted output or excessive ambient. Quiescent current is 5 mA typical, which sets the light-load efficiency floor.","metaTitle":"LD1117ADT-TR STMicroelectronics Adjustable LDO 1A DPAK","metaDescription":"ST LD1117ADT-TR adjustable LDO regulator, 1A output, 80dB PSRR at 120Hz, 1.3V dropout max. Active production, DPAK package. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"80dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1A","Base Product Number":"LD1117","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C~125°C","Voltage - Input (Max)":"15V","Voltage Dropout (Max)":"1.3V @ 1A","Voltage - Output (Max)":"15V","Supplier Device Package":"DPAK","Current - Quiescent (Iq)":"5 mA","Voltage - Output (Min/Fixed)":"1.25V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7500","priceTiers":[{"qty":1,"price":"$0.75000","currency":"USD"},{"qty":10,"price":"$0.65700","currency":"USD"},{"qty":25,"price":"$0.61720","currency":"USD"},{"qty":100,"price":"$0.50360","currency":"USD"},{"qty":250,"price":"$0.46780","currency":"USD"},{"qty":500,"price":"$0.39814","currency":"USD"},{"qty":1000,"price":"$0.32865","currency":"USD"},{"qty":2500,"price":"$0.32865","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1f53874c71a4fc18a5ab2ae913a72296.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD1117ADT-TR/alternatives.json"},"ai":{"faq":[{"question":"Is LD1117ADT-TR equivalent to the fixed-output LD1117 variants?","answer":"The LD1117ADT-TR is the adjustable-output version (1.25V to 15V range). Fixed-output siblings like LD1117DT33 (3.3V) or LD1117DT50 (5.0V) share the same pinout and DPAK package, but the adjust version requires two external resistors to set Vout. They are not drop-in replacements without a board change."},{"question":"Can I get 3.3V out from the LD1117ADT-TR?","answer":"Yes — use a resistor divider from Vout to ADJ. The formula is Vout = 1.25V × (1 + R2/R1). For 3.3V, a typical pair is R1=124Ω, R2=205Ω. The 1.25V reference is stable across the full 1A load and temperature range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD1117ADT-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD1117ADT-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}